Physics-
General
Easy

Question

One plate of a capacitor having charge Q, and plate area A, is pulled by a man keeping one plate at fix position, as shown in figure. What force should be applied by the man such that, plate moves with constant velocity

  1. fraction numerator Q to the power of 2 end exponent over denominator A epsilon subscript 0 end subscript end fraction    
  2. fraction numerator 2 over denominator 3 end fraction fraction numerator Q to the power of 2 end exponent over denominator A epsilon subscript 0 end subscript end fraction    
  3. zero    
  4. fraction numerator Q to the power of 2 end exponent over denominator 2 epsilon subscript 0 end subscript A end fraction    

The correct answer is: fraction numerator Q to the power of 2 end exponent over denominator 2 epsilon subscript 0 end subscript A end fraction

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